Role of ascorbic acid on the growth of maize (Zea mays L.)
2014
Fatima, T.
Ascorbic acid is identified as vitamin C. It acts like an antioxidant as well as a cofactor for many enzymatic reactions and has a vital role in phytochrome-mediated signaling process. Ascorbic acid contributes in cell reclamation and immune defense system in which it protects the cellular organelles from activated oxygen species ultimately preventing cell death. In order to test the effectiveness of ascorbic acid as a growth hormone for maize, ascorbic acid was applied in rooting medium on maize seedlings. The most effective level of ascorbic acid was selected by applying four different concentrations (0.5 mM, 1mM, 1.5mM and 2 mM) of ascorbic acid on maize plant. 1 mM concentration was selected as best level for maize growth in rooting medium. Two varieties of maize (Zea mays L.) i.e. Golden and Sadaf, were grown-up.in pure soil in the wire house of old Botanical Garden, University of Agriculture, Faisalabad. After one week of germination (3 leaf stage), ascorbic acid was applied in rooting medium along with irrigation after every three days for about one month. Data for several growth and physiological attributes were measured and statistically analyzed by using analysis of variance (ANOVA) through COSTAT software. Ascorbic acid was found effective in enhancing growth of maize seedlings. Significant improvement was perceived in different parameters like root and shoot length, plant height, leaf area, fresh and dry mass, chlorophyll a, chlorophyll b and carotenoids content, soluble carbohydrates, osmotic potential, phosphate, calcium and potassium contents of root and shoot as compared to control plants. Sodium contents of root and shoot in both varieties was reduced by ascorbic acid treatment.
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